java 计算器算法脚本

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public String Count(String s) throws ScriptException{
    ScriptEngineManager sem=new ScriptEngineManager();
    ScriptEngine se=sem.getEngineByName("JavaScript");        
    System.out.println(se.eval(s).toString());
    return se.eval(s).toString();
        
    }